REDHAT-BUG-2369388: Medium severity OpenSSL OpenSSL vulnerability

Published May 30, 2025
·
Updated

Incorrect Success Return vulnerability in the sshkdf() function of libssh when built with OpenSSL versions prior to 3.0. This issue arises because libssh interprets OpenSSL's return value 0 (indicating failure) as SSHOK (indicating success). As a result, on failure, the function may return success without initializing the output key buffers. This can lead to the use of uninitialized cryptographic keys, affecting the encryption and decryption of SSH traffic. The vulnerability allows an attacker to exploit improper key handling, potentially resulting in data leakage, integrity issues, or denial of service during SSH communication.

Affected Software

2 affected components
OpenSSL OpenSSL<3.0
libssh libssh

Event History

May 30, 2025
Data Sourced
via Red Hat·11:36 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2369388?

The severity of REDHAT-BUG-2369388 is considered high due to the incorrect interpretation of OpenSSL's return value in the ssh_kdf() function.

2

How do I fix REDHAT-BUG-2369388?

To fix REDHAT-BUG-2369388, upgrade OpenSSL to version 3.0 or later.

3

What is the impact of REDHAT-BUG-2369388?

The impact of REDHAT-BUG-2369388 is that it may allow the function to incorrectly report success when a failure has occurred.

4

Which versions of libssh are affected by REDHAT-BUG-2369388?

All versions of libssh built with OpenSSL versions prior to 3.0 are affected by REDHAT-BUG-2369388.

5

What specific function is vulnerable in REDHAT-BUG-2369388?

The specific function that is vulnerable in REDHAT-BUG-2369388 is the ssh_kdf() function in libssh.

Contact

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